1. Division of Pulmonary, Allergy and Critical Care Medicine, Hallym University College of Medicine, Chuncheon, Korea.
2. Department of Pulmonary and Critical Care Medicine, Ajou University School of Medicine, Suwon, Korea.
3. Department of Radiology, National Cancer Center, Goyang, Korea.
4. Department of Preventive Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea.
5. Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, Korea.
6. National Cancer Control Institute, National Cancer Center, Goyang, Korea.
7. Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
8. Division of Pulmonary and Critical Care Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
9. Department of Internal Medicine, Konkuk University School of Medicine, Chungju, Korea.
10. Department of Radiology, Sungkyunkwan University School of Medicine, Suwon, Korea.
11. Department of Thoracic and Cardiovascular Surgery, National Cancer Center, Goyang, Korea.
12. Department of Pulmonology, National Cancer Center, Goyang, Korea.
13. Department of Radiology, Soon Chun Hyang University Bucheon Hospital, Bucheon, Korea.
14. Department of Radiology, Chungnam National University School of Medicine, Daejeon, Korea.
15. Department of Family Medicine, Dongguk University College of Medicine, Goyang, Korea.
16. Department of Family Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
17. Department of Social and Preventive Medicine, Inha University School of Medicine, Incheon, Korea.
18. Department of Family Medicine, Hallym University College of Medicine, Chuncheon, Korea.
19. Department of Thoracic and Cardiovascular Surgery, The Catholic University of Korea College of Medicine, Seoul, Korea.